.root {
    position: absolute;
    left: 0;
    top: 0;
    width: 100vw;
    height: 100vh;
    overflow: hidden;
    transition: all .25s;
    font-size: 14px;
    z-index: 20;
}

.header {
    width: 100%;
    height: 44px;
    background: rgb(16 142 233);
    color: rgb(255 255 255);
    line-height: 44px;
    padding: 0 20px;
}

.menu {
    display: flex;
    background: rgb(16 142 233);
    color: rgb(255 255 255);
    height: 44px;
    line-height: 44px;
    margin-top: -1px;
    font-size: 15px;
}

.menu a {
    flex: 1;
    text-align: center;
    height: 100%;
    color: #fff;
    opacity: .8;
    border-bottom: 3px solid transparent;
}

.menu .active {
    opacity: 1;
    border-bottom: 3px solid #ffb800;
}

.content {
    position: fixed;
    width: 100%;
    top: 88px;
    bottom: 0;
    background: #f5f5f9;
}